So the witch trials should be forgotten?
Yes, they should as a matter of conflict now - they happened 200 to 500 years ago, most of the people who were arrested, tortured, convicted and executed were no more witches than you, Sassy or Vlad are witches.
It is a matter for historians to investigate and dissect and place into the proper context of the times in which they occurred.
In 2017 the Witch Trials of the 1430's to the 1750's have no more relevance than the discovery of how to make a flint axehead!
Does it really change anything that some English plonker kiled your great (seventeen times) grandfather? For all you know had he not been killed by some English plonker your line from him might never have existed.